Universal electric damper and fire-alarm



(No Model.) l

E. A. MORLEY.

UNIVERSAL ELEGTRIGDA'MPER AND FIRE LARM.

PatentedOct. 12, 1886- PETERS. PhclwUlhogr-mphar. Waimnginn. D. C.

' UNITED STATES PATENT OFF CE.

EDVARD A. MORLEY, OF LEE, MASSACHUSETTS.

UNIVERSAL ELECTRIC DAMPER AND FIRE-ALARM.

SPECIFICATION forming part of Letters Patent No. 350,558, dated October12, 1886.

Application filed February 8, 1886. Serial No. @1249. (No model.)

To all whom) it may concern:

Be it known that I, EDWARD A. MORLEY, a citizen of the United States,residing at Lee, in the county of Berkshire and State of Massachusetts,have invented anew and useful Universal Electric Damper and Fire-Alarm,of which the following is a specification.

My invention relates to electric dampers, and has for its object toprovide means for automatically regulating the temperature of rooms,hot-houses, incubators, and other inclosures wherein it is necessary ordesirable that an even temperature be maintained.

The invention involves, primarily, the principles of the expansion ofmetals by heat, the electric current, and the electro-magnet; and

the invention consists in the devices and theirarrangement foraccomplishing the object stated, as will be hereinafter more fully setforth.

In the accompanying drawings, Figure 1 illustrates the parts and theirarrangement in accordance with my invention; Fig. 2, the damper. Fig. 8is a top view of the dialplatc, an adjustable screw, and indicatingfinger or pointer. V l

The apparatus A'consists of the plate 0 having upon its undersideasnitable block or extension, I), of wood or other good non-conductor ofelectricity. The plate ais provided with asuitable opening, 0, throughwhich extends a strip or rod of copper, brass, or other good expander byheat. The strip or rod 0 is secured at its lower end to the lower end ofthe block b, and at its upper end to a stiff spring, (I, which will keepthe said rod or strip distended, and at the same time freely permititsexpansion and contraction. This spring (I is insulatedly secured uponthe bed or plate a by means of a set-screw, e, passing through abushing, e, of suitable insulating material. Upon the upper side of theplate ais mounted upon suitable posts or standards the under plate, f,provided with suitable marks of graduation, and through a suitablebushing, f, is passed an adjustable screw, g, having its lower end inthe line of the .eX- panding rod or strip 0'. Therupper end of thisadjustable screw is provided with an index finger or pointer, and thedifferent degrees'to which it is desired the temperature an armature, m.

' should rise may be determined by different adjustments of the screw,the respective degrees being indicated by the finger or pointer upon thedial-plate.

In the apparatus for operating the damper (indicated by the letter B)the letter h indicates a suitable frame, in which is insulatedly securedthe electro-magnets 1 having cores 1', and pivoted in this frame uponsuitable bearings, jj, is an arbor, k, carrying alever, Z, and The arbork is mounted in the frame, so that the armature will oscillate intheplane of the cores 1" and be attracted by said cores when the magnetis energized. The lower end of the lever is provided with a damper, a,adapted to cover an opening leading to the outer air. The upper end ofthe lever may be provided with an adjustable balancing-weight, 0,whereby the lever Z may be nicely balanced and operated readily by theaction of the electromagnets. The bearings are such as to permit theeasy movement of the arbor. Conductors of electricity, 1; and 1), havingtheir terminals connected with a suitable galvanic battery, 9, areconnected with the coils. .lhe apparatus A is interposed in one of theseconductors, p, onecnd being connected to a binding-post, r, on the platea, and the other tot-he binding-post 1", in electrical contact with thespring (I.

The operation is as follows: The screw 9 is adjusted so that its lowerend is the proper distance from the outer end of the spring (I. Now,when the heat becomes so high as to expand the strip or rod 0 until thespring cl comes into contact with the lower end of the screw g, thecircuit between 1) and-p will be completed through the battery q, postr, spring (I, screw the dial-plate audits standards or supports, platea, binding-post 1', thus energizing the electromagnets 2', which willattract the ends of the armaturem, causing the lever Z to oscillate andremove the damper a from the opening, admitting fresh air. Vhen theairin the inclosure has sufficiently cooled, the strip or rod 0 willcontract, thus breaking the circuit and demagnetizingthe cores i, whenthe damper a will fall, again closing the opening.

. The damper a may be made funnel-shaped and opened at its upper sideand provided with a small opening at its apex,to permit the exit of theWater ofcondensatio11,which would otherwise make that end too heavy, andthus interfere with the proper operation of the apparatus.

The plate a may be provided with suitable screws for securing it in aportion of the apparatus or room upon or in which it is to be used.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-- 1. In an apparatus, substantially as described,for regulating the temperature of rooms and other inclosures, the plateor frame (1, provided at one side with the extension I) and theexpanding rod 0, combined with the dial-plate and an adjustable screwpassing therethrough, having its lower end in theline IJDXVARD A.MORLEY.

Vi tnesses;

E. T. STRONG,

CHAS. E. LUMBEmr.

